Answer:
I'll step in as a "classmate" and answer these questions for you.
My day was long. It felt so long because I only just got off vacation, so I've become unused to waking early. Right now, I am feeling content.
My emotions determine how my day goes because whether a day went well or poorly is actually just my emotional response to the day. If I'm in a good mood, I'll have a good day, and vice versa.